IBM System Storage EXP3500 Express (Data Sheet-USEN)
IBM System Storage EXP3500 is a 2U expansion unit available in two models. EXP3512 supports twelve 3.5-inch SAS drives. EXP3524 supports up to twenty-four 2.5-inch SAS drives. Both have redundant components and 6 Gbps SAS drive ports to help ensure high performance and availability.